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These composite materials undergo various loading conditions during their service life such as impact loadings condition.
Table 2 shows the mechanical properties of these materials.
Ziliukas: Experimental Research of the Impact Response of E-Glass/Epoxy and Carbon/Epoxy Composite Systems, Materials Sciences, Vol. 16, No. 4, (2010), p. 324-329
Rajesh Mathivanan, J, Jerald: Experimental Investigation of Woven E-Glass Epoxy Composite Laminates Subjected to Low-Velocity Impact at Different Energy Levels, Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No. 7, (2010), p. 643-652
:Tensile Property of Hand Lay-up Plain-weave Woven e-glass/polyester Composite: Curing Pressure and Ply Arrangement Effect, Journal of Borneo Science ,Vol. 19, (2006), p. 27-34

Several parameters were chosen to find out the appropriate positions of two different materials, parameters and results are shown in Table 3.
As a result, we can find that tensile strength of the friction stir weld is better than base materials with lower tensile strength.
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Panella: Journal of Materials Processing Technology Vol. 206 (2008), p. 249 [5] A.
Withers: Materials Science and Engineering A Vol. 441 (2006), p. 187

Utilization of Waste Printed Circuit Board Resin in Controlled Low-Strength Materials Ing-Jia Chiou1,a, Chu-Chan Chiang2,b, Cheng-Lan Ho2,b 1 Graduate School of Materials Applied Technology, Taoyuan Innovation Institute of Technology, No. 414, Sec.3, Jhongshan E.
Adaska, Controlled Low-Strength Materials.
Rafat, Utilization of waste materials and by-products in producing controlled low-strength materials, Resources, Conservation and Recycling, Vol. 54 (2009), p.1-8
Rosell, Combined use of MSWI bottom ash and fly ash as aggregate in concrete formulation: Environmental and mechanical considerations, Journal of Hazardous Materials, Vol. 169 (2009), p.643-650
Siti, Performance appraisal of industrial waste incineration bottom ash as controlled low-strength material, Journal of Hazardous Materials, Vol. 172 (2009), p.862-867

Comparing with classical homogeneous materials, stress concentration at the inner surface of hollow cylinder composed of functionally graded materials can be alleviated.
For functionally graded materials, the elastic ultimate bearing capacity can be improved strikingly by increasing the thickness of cylinder, which is not so obvious for classical homogeneous materials.
Functionally graded materials (FGM) are new advanced composite materials with continuously varying properties in one or multi directions.
Acknowledgement The study is supported by the National Natural Science Foundation of China (Grant no. 50874047).
AIAA Journal Vol. 46(2008), p. 2050

Abstract.This paper investigated several influencing factors for the preparation of solid alcohol, including the amount of raw materials used such as stearic acid and coppernitrate and so on, and the temperature, etc.
Experimental Materials and reagents:Industrial alcohol, stearic acid, sodium hydroxide, phenolphthalein, copper nitrate, beaker, thermometer, measuring cylinder, pipette, electric furnace, electronic scale.
[5] Yin G.J and Li D: Journal of luoyang institute of science and technology (natural science edition), 18 (2008),p.32
[9] Yin Y.M: Journal of qinghai university (natural science edition), Vol. 21(2003),p.44
[12] Jia J, Zhang S.S and Zhang Z.X: Journal of capital normal university (natural science edition), Vol. 27(2006),p.52

It is one of the important materials which relates to motor energy conversion and service life.
Japanese Journal of Applied Physics. 1987, 26(1):197-199
Wear Properties and Life Prediction of Friction Materials for Ultrasonic Motors.
A Wear Evaluation Chart if Friction Materials Used for Ultrasonic Motors.
Wear and dynamic properties of piezoelectric ultrasonic motor with frictional materials coated stator, Materials Chemistry and Physics, 2005, 90:391~395 [7] Ding Qingjun.

It is defined as . (1) where ,. (2) with and for BCC and FCC materials, respectively.
However, the Voce type isotropic hardening law tends to generate a saturating curve for stable materials, which may lead to a difficulty in fitting some materials that show a relatively flat stress-strain curve.
International Journal of Mechanical Sciences 2011; 53: 425–435
International Journal of Mechanical Sciences 2003; 45:1687–702
Journal of Manufacturing Science and Engineering-Transactions of the Asme, 2007, 129 (2): 352-359.

Experimental Details Materials.
ICT1210), and Science Foundation of State Key Lab of Silicon Materials (project No.
Ensafi: Materials Science and Engineering C Vol.37 (2014), p.113 [8] L.
Kumar: Journal of Membrane Science Vol.454(2014), p.359 [20] S.
Yang: Journal of Colloid and Interface Science Vol.418(2014), p.171 [31] R.

Additionally, as far as the development of knowledge and competence of pre-service and in service teachers of special education are concerned, current E-Learning platforms provide only knowledge and teaching materials related to formal teaching knowledge, but not sufficient practical knowledge required for solving students’ learning problems [8].
Additionally, intelligent E-Learning systems, unlike traditional forms of learning, enable personalized learning materials, learning environment, and evaluation methods suitable for a student’s current knowledge level and needs.
BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY, Vol. 8(2007), p. 197-210 [2] Kozierkiewicz-Hetmanska A.
JOURNAL OF COMPUTER ASSISTED LEARNING.
JOURNAL OF UNIVERSAL COMPUTER SCIENCE, Vol. 14(2008), p. 2737-2755 [8] Mohamed Koutheaïr Khribi1, Mohamed Jemni1, Olfa Nasraoui.

Introduction Though the water jet technology has been widely used in industrial cutting, processing, digging, exploiting and drilling, resurfacing, and materials breaking etc, there is not a clear cognition on the mutual interacting mechanism between water jets and solid materials.
Acknowledgement This work was supported by National Natural Science Foundation of China (No. 50904075), the Major State Basic Research Development Program of China (973 Program) (No. 2010CB226706).
Journal of Shi You DaXue Xuebao, 2002 , 26 (3) : 37-40 [2] Z.Guo, M.Ramulu and M.G.Jenkins.
Journal of the University of Petroleum,1997, 21(4): 18–22
Journal of Hydrodynamics(Ser.B), 2003,15 (2):71-76 [7] Wang Xucheng, Zhen Ming.